[minima] Re: Some Updates from Me!
- From: Thomas Sarlandie <thomas@xxxxxxxxxxxxx>
- To: "minima@xxxxxxxxxxxxx" <minima@xxxxxxxxxxxxx>
- Date: Tue, 28 Jan 2014 17:57:48 -0800
Farhan,
You are correct. The "summary" datasheet does not mention it but the curve
page 310 of the full datasheet clearly says that 3.3v can run at 10Mhz max
(cf
http://www.atmel.com/Images/Atmel-8271-8-bit-AVR-Microcontroller-ATmega48A-48PA-88A-88PA-168A-168PA-328-328P_datasheet.pdf
).
However, if you define your own board in arduino and define your quartz
frequency correctly, all the timing will "magically" adjust and it should
work. I have done it before for the leonardo (it was a bit more complicated
because of the usb connection).
We might also be able to just use a 8mhz quartz and the arduino nano
standard config.
I will give this a try.
thomas
On Tue, Jan 28, 2014 at 5:49 PM, <farhanbox@xxxxxxxxx> wrote:
> Thomas,
> I couldn't lay my hands on the 3.3v part. The regular 328P will only run
> upto 8 mhz at 3.3v. This means, that the serial port timing will go off
> unless we use a 3.3v bootloader (again, something that I didn't have).
>
> - f
> Sent from BlackBerry® on Airtel
> ------------------------------
> *From: * Thomas Sarlandie <thomas@xxxxxxxxxxxxx>
> *Sender: * minima-bounce@xxxxxxxxxxxxx
> *Date: *Tue, 28 Jan 2014 15:12:28 -0800
> *To: *minima@xxxxxxxxxxxxx<minima@xxxxxxxxxxxxx>
> *ReplyTo: * minima@xxxxxxxxxxxxx
> *Subject: *[minima] Re: Some Updates from Me!
>
> Everyone running a 5V chip will need to comment out those lines to make
> sure the Si570 does not receive 5v on the i2c lines. The change disables
> the build-in pull up resistors. They are replaced in the design by two
> external pull-ups attached to the 3.3v rail.
>
> See this page for details:
> http://www.hfsignals.org/index.php/Radiono
>
> Another option is to simply run the atmega328 at 3.3v. According to the
> datasheet, it will still support running at 20mhz with a power supply of
> 3.3v. Farhan, have you considered this option?
>
> thomas
>
>
> On Tue, Jan 28, 2014 at 3:08 PM, <jerry@xxxxxxxxxxxxxxxx> wrote:
>
>> I dont know, we have to ask Farhan about that. But, I believe all the
>> wire. changes Mark made were because he used a different chip. Jerry
>> K5LRU
>>
>>
>> -------- Original Message --------
>> Subject: [minima] Re: Some Updates from Me!
>> From: "pakdeDar" <pakdedarmantaoye@xxxxxxxxx>
>> Date: Tue, January 28, 2014 4:55 pm
>> To: "Minima Group" <minima@xxxxxxxxxxxxx>
>>
>> Does it means no need to use modified wire.h as long as I use same chip
>> and Farhan's code Jerry ?
>>
>> Kaspa-kaspaanlayauw ®
>>
>> -----Original Message-----
>> From: <jerry@xxxxxxxxxxxxxxxx>
>> Sender: minima-bounce@xxxxxxxxxxxxx
>> Date: Tue, 28 Jan 2014 15:50:22
>> To: <minima@xxxxxxxxxxxxx>
>> Reply-To: minima@xxxxxxxxxxxxx
>> Subject: [minima] Re: Some Updates from Me!
>>
>> From the way I understand it, Mark didn't use the ATMega328P chip, he
>> used a different ATMega chip. The code that Farhan wrote was for the 328
>> chip. I don't think you have to make any changes to that. Maybe I'm
>> wrong, but it is something we need to make clear. Jerry K5LRU
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>> -------- Original Message --------
>> Subject: [minima] Re: Some Updates from Me!
>> From: "pakdeDar" <pakdedarmantaoye@xxxxxxxxx>
>> Date: Tue, January 28, 2014 2:49 pm
>> To: "Minima Group" <minima@xxxxxxxxxxxxx>
>>
>> Hi Mark,
>>
>> So it's not as simple as I think .
>> To buy chip w/ bootloader already loaded was easy to find. But then
>> programmed it using Uno board is not my expectation, I think from the
>> beginning you got proven that the chip could be programmed using usb to
>> serial.
>>
>> What I want to know is the type of the usb to serial converter cable you
>> use. Other is what kind of bootloader to be loaded.
>>
>> My conclusion is that from the beginning the chips should have been
>> loaded w/ bootloader, fully blank chip could not been loaded a
>> bootloader by this system. I may be wrong..
>>
>> Hope Farhan or other in this forum who has done this method could
>> explain more detail.
>>
>> Yes, I have read your wire.h modification even I do not fully understand
>> due to my limited knowledge to Arduino.
>>
>> Thanks for your explanation Mark. It is valuable to me.
>>
>> Sudarmanta
>>
>> Kaspa-kaspaanlayauw ®
>> From: Mark G0MGX <mark.g0mgx@xxxxxxxxx>
>> Sender: minima-bounce@xxxxxxxxxxxxx
>> Date: Tue, 28 Jan 2014 16:52:00 +0000
>> To: minima@xxxxxxxxxxxxx<minima@xxxxxxxxxxxxx>
>> ReplyTo: minima@xxxxxxxxxxxxx
>> Subject: [minima] Re: Some Updates from Me!
>>
>>
>> Hi
>>
>> 1. I bought some chips with Arduino bootloader already loaded from eBay
>> months ago and used one of them
>> 2. no - I put chip into Uno board, programmed it and then pulled out
>> chip and put into stripboard socket - I will use usb to serial later
>> 3. yes - but i modified the wire.h library files as I documented on the
>> wiki. I also changed the function button code as discussed on the forum.
>> I can publish code changes again if needed.
>>
>>
>> M
>>
>>
>>
>>
>> On 28 January 2014 15:28, pakdeDar <pakdedarmantaoye@xxxxxxxxx> wrote:
>> Hello Mark,
>>
>> Please tell me that you have succesfully load the Radiono.ino sketch to
>> the processor board you build on stripboard and boxed. All the
>> controller feature works well is'n it ?
>>
>> Inform me :
>>
>> 1. What kind of bootloader you loaded to the Atmega chip
>>
>> 2. Did you use usb to serial port cable converter to load the sketch ?
>>
>> 3. The sketch developed by Farhan and upload in GitHub was completely
>> works without some revision.
>>
>> I will start to build like your's while I get to find Si570.
>>
>> Regards,
>>
>> Sudarmanta - YC1DCN
>>
>> Kaspa-kaspaanlayauw ®
>>
>> -----Original Message-----
>> From: Mark G0MGX <mark.g0mgx@xxxxxxxxx>
>> Sender: minima-bounce@xxxxxxxxxxxxx
>> Date: Sun, 26 Jan 2014 08:47:27
>> To: <minima@xxxxxxxxxxxxx>
>> Reply-To: minima@xxxxxxxxxxxxx
>> Subject: [minima] Some Updates from Me!
>>
>>
>> Morning Team
>>
>> I've started to construct a case for the project here:
>>
>> http://g0mgx.blogspot.co.uk/2014/01/boxing-to-minima.html
>>
>> and also built the processor board on some stripboard and mounted it
>> behind the LCD here:
>>
>> http://g0mgx.blogspot.co.uk/2014/01/minima-processor-board.html
>>
>> Mark
>> G0MGX
>>
>>
>
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